Retractable utility knife



FIG. 1 is a front side view showing a retractable utility knifeaccording to the present invention wherein a front portion of a casingof the retractable utility knife is transparent;

FIG. 2 is rear side view showing the retractable utility knife accordingto the present invention wherein a rear portion of the casing is opaque;

FIG. 3 is top plan view of the retractable utility knife according tothe present invention;

FIG. 4 is a bottom plan view of the retractable utility knife accordingto the present invention;

FIG. 5 is a front end view of the retractable utility knife according tothe present invention;

FIG. 6 is a rear end view of the retractable utility knife according tothe present invention; and,

FIG. 7 is a perspective view of the retractable utility knife accordingto the present invention.

The ornamental design for a retractable utility knife, as shown anddescribed.